package com.jdone.compus.utils;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpUtil {

    /**
     * 发送GET请求
     */
    public static String sendGet(String url) throws Exception {
        StringBuilder result = new StringBuilder();
        BufferedReader in = null;
        
        try {
            URL realUrl = new URL(url);
            HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
            
            // 设置请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            
            // 建立实际的连接
            connection.connect();
            
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return result.toString();
    }
}
